215232

Appears in sequences

• Expansion of g.f. (1 + x - 2*x^2 - x^3)/(1/2 - 2*x^2 + x^4).at n=20A030435
• a(n) = (2 + sqrt(2))^n + (2 - sqrt(2))^n.at n=10A056236
• Numbers that have exactly nine prime factors counted with multiplicity (A046312) whose digit reversal is different and also has 9 prime factors (with multiplicity).at n=13A109029
• Number of meaningful differential operations of the k-th order on the space R^12.at n=16A129639